Novak Djokovic

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Novak Djokovic hits a backhand during his first-round match against Michael Berrer at Wimbledon on Monday. Djokovic, the reigning Australian Open champion, beat Berrer, 7-5, 2-6, 6-3, 6-0, to advance to the second round, where he will face Marat Safin.

Novak Djokovic hits a backhand during his first-round match against Michael Berrer at Wimbledon on Monday. Djokovic, the reigning Australian Open champion, beat Berrer, 7-5, 2-6, 6-3, 6-0, to advance to the second round, where he will face Marat Safin. (Getty Images)

Novak Djokovic hits a backhand during his first-round match against Michael Berrer at Wimbledon on Monday. Djokovic, the reigning Australian Open champion, beat Berrer, 7-5, 2-6, 6-3, 6-0, to advance to the second round, where he will face Marat Safin.